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   源码介绍

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using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace Hjw.Controls
{
	/// <summary>
	/// 一个类似于 MSN Popup 的任务消息通知器
	/// </summary>
	public class TaskNotifier : System.Windows.Forms.Form
	{
		#region Private Fields
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.ImageList imageList1;
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.Panel panel1;
		private System.Windows.Forms.LinkLabel linkContent;		
		private TaskState m_TaskState = TaskState.Hidden;
		private System.Drawing.Rectangle m_maxBound;
		private System.Windows.Forms.Timer timer1;

		private CallBackHandler callback = null;
		private System.Object m_callbackTag = null;

		private bool isMouseEnter = false;
		private bool isMouseMove = false;

		private System.Collections.Hashtable m_hashButtons = null;
		private System.Object m_skinButtonName = null;

		private UnSafeDiposeHandler m_unSafeDipose;

		static private TaskNotifier objTaskNotifier = new TaskNotifier();
		#endregion

		#region Constructors
		/// <summary>
		/// new
		/// </summary>
		public TaskNotifier()
		{
			this.InitializeComponent();
			this.timer1.Stop();
			//初始化工作区大小
			System.Drawing.Rectangle rect = System.Windows.Forms.Screen.GetWorkingArea( this );
			this.m_maxBound = new System.Drawing.Rectangle( rect.Right - this.Width - 1, rect.Bottom - this.Height - 1, this.Width, this.Height );
		}
		#endregion

		#region 控件自动生成的代码
		/// <summary>
		/// InitializeComponent
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(TaskNotifier));
			this.label1 = new System.Windows.Forms.Label();
			this.imageList1 = new System.Windows.Forms.ImageList(this.components);
			this.panel1 = new System.Windows.Forms.Panel();
			this.linkContent = new System.Windows.Forms.LinkLabel();
			this.timer1 = new System.Windows.Forms.Timer(this.components);
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.ImageIndex = 0;
			this.label1.ImageList = this.imageList1;
			this.label1.Location = new System.Drawing.Point(322, 10);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(18, 18);
			this.label1.TabIndex = 0;
			this.label1.Click  = new System.EventHandler(this.label1_Click);
			this.label1.MouseEnter  = new System.EventHandler(this.label1_MouseEnter);
			this.label1.MouseLeave  = new System.EventHandler(this.label1_MouseLeave);
			// 
			// imageList1
			// 
			this.imageList1.ImageSize = new System.Drawing.Size(18, 18);
			this.imageList1.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList1.ImageStream")));
			this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// panel1
			// 
			this.panel1.BackColor = System.Drawing.Color.Transparent;
			this.panel1.Location = new System.Drawing.Point(60, 51);
			this.panel1.Name = "panel1";
			this.panel1.Size = new System.Drawing.Size(270, 19);
			this.panel1.TabIndex = 2;
			// 
			// linkContent
			// 
			this.linkContent.ActiveLinkColor = System.Drawing.Color.FromArgb(((System.Byte)(204)), ((System.Byte)(0)), ((System.Byte)(0)));
			this.linkContent.BackColor = System.Drawing.Color.Transparent;
			this.linkContent.Location = new System.Drawing.Point(60, 14);
			this.linkContent.Name = "linkContent";
			this.linkContent.Size = new System.Drawing.Size(254, 32);
			this.linkContent.TabIndex = 3;
			this.linkContent.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.linkContent.LinkClicked  = new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkContent_LinkClicked);
			// 
			// timer1
			// 
			this.timer1.Enabled = true;
			this.timer1.Tick  = new System.EventHandler(this.timer1_Tick);
			// 
			// TaskNotifier
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
			this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
			this.ClientSize = new System.Drawing.Size(344, 74);
			this.ControlBox = false;
			this.Controls.Add(this.linkContent);
			this.Controls.Add(this.panel1);
			this.Controls.Add(this.label1);
			this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "TaskNotifier";
			this.ShowInTaskbar = false;
			this.TopMost = true;
			this.MouseMove  = new System.Windows.Forms.MouseEventHandler(this.TaskNotifier_MouseMove);
			this.MouseEnter  = new System.EventHandler(this.TaskNotifier_MouseEnter);
			this.MouseLeave  = new System.EventHandler(this.TaskNotifier_MouseLeave);
			this.ResumeLayout(false);

		}
		#endregion

		#region WinAPI
		/// <summary>
		/// 显示窗体
		/// </summary>
		/// <param name="hWnd"></param>
		/// <param name="nCmdShow"></param>
		/// <returns></returns>
		[DllImport("user32.dll")]
		private static extern Boolean ShowWindow( IntPtr hWnd, Int32 nCmdShow );
		#endregion

		#region Methods
		/// <summary>
		/// 返回此对象的单件实例
		/// </summary>
		/// <returns></returns>
		static public TaskNotifier Instance()
		{
			return objTaskNotifier;
		}
		/// <summary>
		/// 添加回传按钮列表
		/// </summary>
		/// <param name="name"></param>
		/// <param name="controls"></param>
		public void AddCallbackButton( System.Object name, System.Windows.Forms.Control[] controls )
		{
			if( name == null )
				throw new ArgumentNullException( "Name" );
			if ( controls == null )
				throw new ArgumentNullException( "Controls" );

			if( !this.CallBackButtons.Contains( name ) && controls.Length > 0 )
			{
				System.EventHandler evt = new EventHandler( this.callBackButton_Click );
				foreach( System.Windows.Forms.Control callBackButton in controls )
				{
					callBackButton.Click  = evt;
				}
				this.CallBackButtons.Add( name, controls );
			}
		}
		/// <summary>
		/// callBackButton_Click
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void callBackButton_Click(object sender, EventArgs e)
		{
			this.Hide();
		}
		/// <summary>
		/// 当移至上面时改变时样式
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void label1_MouseEnter(object sender, System.EventArgs e)
		{
			this.label1.ImageIndex = 1;
		}
		/// <summary>
		/// 当离开时还原其样式
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void label1_MouseLeave(object sender, System.EventArgs e)
		{
			this.label1.ImageIndex = 0;
		}
		/// <summary>
		/// 单击事件
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void label1_Click(object sender, System.EventArgs e)
		{
			this.Hide();
		}		
		/// <summary>
		/// 在窗体内移动
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void TaskNotifier_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			this.isMouseEnter = true;
			this.isMouseMove = true;
		}
		/// <summary>
		/// 进入此窗体
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void TaskNotifier_MouseEnter(object sender, System.EventArgs e)
		{
			this.isMouseEnter = true;
			this.isMouseMove = true;
		}
		/// <summary>
		/// 离开此窗体
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void TaskNotifier_MouseLeave(object sender, System.EventArgs e)
		{
			this.isMouseEnter = false;
			this.isMouseMove = false;
		}
		/// <summary>
		/// timer1_Tick
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void timer1_Tick(object sender, System.EventArgs e)
		{
			switch( this.CurrentTaskState )
			{
				case TaskState.Visible:
					this.timer1.Stop();
					this.timer1.Interval = 100;

					if( !( this.isMouseEnter && this.isMouseMove ) )
						this.CurrentTaskState = TaskState.Disappearing;

					this.timer1.Start();
					break;
				case TaskState.Appearing:
					if( this.Height <= this.m_maxBound.Height - 12 )
						this.SetBounds( this.m_maxBound.X, this.Top - 12, this.m_maxBound.Width, this.Height   12 );
					else
					{
						this.timer1.Stop();
						this.SetBounds( this.m_maxBound.X, this.m_maxBound.Y, this.m_maxBound.Width, this.m_maxBound.Height );
						this.CurrentTaskState = TaskState.Visible;
						this.timer1.Interval = 5000;
						this.timer1.Start();
					}
					break;
				case TaskState.Disappearing:
					if ( this.isMouseEnter && this.isMouseMove )
						this.CurrentTaskState = TaskState.Appearing;
					else
					{
						if( this.Top <= this.m_maxBound.Bottom - 12 )
							this.SetBounds( this.m_maxBound.X, this.Top   12, this.m_maxBound.Width, this.Height - 12 );
						else
						{
							this.Hide();
							this.OnUnSafeDispose( this.m_callbackTag );
						}
					}
					break;
			}
		}
		/// <summary>
		/// 显示窗体
		/// </summary>
		/// <param name="str">要显示的内容</param>
		public void Show( System.String str )
		{
			this.Show( "", str, null, null, null );
		}
		/// <summary>
		/// 显示窗体
		/// </summary>
		/// <param name="str">要显示的内容</param>
		/// <param name="tag">设置此Popup的相关数据对象</param>
		/// <param name="callback">当单击显示的内容时的回调事件</param>
		public void Show( System.String str, System.Object tag, CallBackHandler callback )
		{
			this.Show( "", str, tag, callback, null );
		}
		/// <summary>
		/// 显示窗体
		/// </summary>
		/// <param name="skinButtonName">自定义按钮skin名称</param>
		/// <param name="str">要显示的内容</param>
		/// <param name="tag">设置此Popup的相关数据对象</param>
		/// <param name="callback">当单击显示的内容时的回调事件</param>
		/// <param name="unSafeDispose">当Popup自动关闭时引发的事件</param>
		public void Show( System.Object skinButtonName, System.String str, System.Object tag, CallBackHandler callback, UnSafeDiposeHandler unSafeDispose )
		{
			if( this.CurrentSkinButtonName != skinButtonName )
			{
				this.CurrentSkinButtonName = skinButtonName;
				this.panel1.Controls.Clear();
				if( skinButtonName != null )
				{
					System.Windows.Forms.Control[] ctls = this.CallBackButtons[ skinButtonName ] as System.Windows.Forms.Control[];
					if( ctls != null && ctls.Length > 0 )
					{
						System.Int32 width = 0;
						foreach( System.Windows.Forms.Control ctl in ctls )
						{
							ctl.Location = new System.Drawing.Point( width, 0 );
							width  = ctl.Size.Width;
						}
						this.panel1.Controls.AddRange( ctls );
					}
				}
			}
			this.linkContent.Text = str;

			switch( this.CurrentTaskState )
			{
				case TaskState.Hidden:
					this.CurrentTaskState = TaskState.Appearing;
					this.SetBounds( this.m_maxBound.X, this.m_maxBound.Y   this.m_maxBound.Height, this.m_maxBound.Width, 0 );
					ShowWindow( this.Handle, 4 );
					this.timer1.Interval = 100;
					this.timer1.Start();
					break;
				case TaskState.Visible:
					this.timer1.Stop();
					this.timer1.Interval = 5000;
					this.timer1.Start();
					this.OnUnSafeDispose( this.m_callbackTag );
					break;
				case TaskState.Disappearing:
					this.timer1.Stop();
					this.CurrentTaskState = TaskState.Visible;
					this.SetBounds( this.m_maxBound.X, this.m_maxBound.Y, this.m_maxBound.Width, this.m_maxBound.Height );
					this.timer1.Interval = 5000;
					this.timer1.Start();
					this.OnUnSafeDispose( this.m_callbackTag );
					break;
				case TaskState.Appearing:
					this.OnUnSafeDispose( this.m_callbackTag );
					break;
			}

			this.callback = callback;
			this.m_callbackTag = tag;
			//设置自定义回传按钮的 Tag 值 
			if ( this.panel1.Controls.Count > 0 && tag != null )
			{
				foreach ( System.Windows.Forms.Control child in this.panel1.Controls )
				{
					child.Tag = tag;
				}
			}
			this.m_unSafeDipose = unSafeDispose;
		}
		/// <summary>
		/// 隐藏
		/// </summary>
		public new void Hide()
		{
			if( this.CurrentTaskState != TaskState.Hidden )
			{
				this.timer1.Stop();
				this.CurrentTaskState = TaskState.Hidden;
				base.Hide();
			}
		}
		/// <summary>
		/// 单击超链接时发生的事件
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void linkContent_LinkClicked( object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e )
		{
			this.OnCallBack( this.m_callbackTag );
		}
		/// <summary>
		/// 触发回传事件
		/// </summary>
		/// <param name="tag"></param>
		protected virtual void OnCallBack( System.Object tag )
		{
			if ( this.callback != null )
			{
				this.Hide();
				this.callback( tag );
			}
		}
		/// <summary>
		/// 引发
		/// </summary>
		/// <param name="tag"></param>
		protected virtual void OnUnSafeDispose( System.Object tag )
		{
			if ( this.m_unSafeDipose != null )
				this.m_unSafeDipose( tag );
		}
		#endregion			
		
		#region Properties
		/// <summary>
		/// 获取或设置当前的显示状态
		/// </summary>
		protected TaskState CurrentTaskState
		{
			get { return this.m_TaskState; }
			set { this.m_TaskState = value; }
		}
		/// <summary>
		/// 获取回传接钮列表
		/// </summary>
		private System.Collections.Hashtable CallBackButtons
		{
			get 
			{
				if ( this.m_hashButtons == null )
					this.m_hashButtons = new System.Collections.Hashtable();
				return this.m_hashButtons;
			}
		}
		/// <summary>
		/// 获取或设置当前的回传按钮名称
		/// </summary>
		protected System.Object CurrentSkinButtonName
		{
			get { return this.m_skinButtonName; }
			set { this.m_skinButtonName = value; }
		}
		#endregion
		
		#region TaskState
		/// <summary>
		/// 定义一个任务通知器的状态枚举
		/// </summary>
		protected enum TaskState
		{
			/// <summary>
			/// 隐藏
			/// </summary>
			Hidden = 100,
			/// <summary>
			/// 可视
			/// </summary>
			Visible = 200,
			/// <summary>
			/// 刚刚显示，但还没显示完全
			/// </summary>
			Appearing = 300,
			/// <summary>
			/// 即将消失
			/// </summary>
			Disappearing
		}
		#endregion		

		#region Delegates
		/// <summary>
		/// 定义一个回调委托
		/// </summary>
		public delegate void CallBackHandler( System.Object tag );
		/// <summary>
		/// 定义一个因非正常关闭Popup的事件委托
		/// </summary>
		public delegate void UnSafeDiposeHandler( System.Object tag );
		#endregion
	}
}